2x^2+27x-8.3=0

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Solution for 2x^2+27x-8.3=0 equation: 


Simplifying
2x2 + 27x + -8.3 = 0

Reorder the terms:
-8.3 + 27x + 2x2 = 0

Solving
-8.3 + 27x + 2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-4.15 + 13.5x + x2 = 0

Move the constant term to the right:

Add '4.15' to each side of the equation.
-4.15 + 13.5x + 4.15 + x2 = 0 + 4.15

Reorder the terms:
-4.15 + 4.15 + 13.5x + x2 = 0 + 4.15

Combine like terms: -4.15 + 4.15 = 0.00
0.00 + 13.5x + x2 = 0 + 4.15
13.5x + x2 = 0 + 4.15

Combine like terms: 0 + 4.15 = 4.15
13.5x + x2 = 4.15

The x term is 13.5x.  Take half its coefficient (6.75).
Square it (45.5625) and add it to both sides.

Add '45.5625' to each side of the equation.
13.5x + 45.5625 + x2 = 4.15 + 45.5625

Reorder the terms:
45.5625 + 13.5x + x2 = 4.15 + 45.5625

Combine like terms: 4.15 + 45.5625 = 49.7125
45.5625 + 13.5x + x2 = 49.7125

Factor a perfect square on the left side:
(x + 6.75)(x + 6.75) = 49.7125

Calculate the square root of the right side: 7.050709184

Break this problem into two subproblems by setting 
(x + 6.75) equal to 7.050709184 and -7.050709184.


Subproblem 1
x + 6.75 = 7.050709184

Simplifying
x + 6.75 = 7.050709184

Reorder the terms:
6.75 + x = 7.050709184

Solving
6.75 + x = 7.050709184

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-6.75' to each side of the equation.
6.75 + -6.75 + x = 7.050709184 + -6.75

Combine like terms: 6.75 + -6.75 = 0.00
0.00 + x = 7.050709184 + -6.75
x = 7.050709184 + -6.75

Combine like terms: 7.050709184 + -6.75 = 0.300709184
x = 0.300709184

Simplifying
x = 0.300709184


Subproblem 2
x + 6.75 = -7.050709184

Simplifying
x + 6.75 = -7.050709184

Reorder the terms:
6.75 + x = -7.050709184

Solving
6.75 + x = -7.050709184

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-6.75' to each side of the equation.
6.75 + -6.75 + x = -7.050709184 + -6.75

Combine like terms: 6.75 + -6.75 = 0.00
0.00 + x = -7.050709184 + -6.75
x = -7.050709184 + -6.75

Combine like terms: -7.050709184 + -6.75 = -13.800709184
x = -13.800709184

Simplifying
x = -13.800709184


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {0.300709184, -13.800709184}

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